"In sum, most students can speak about profound Dzogchen view-- oral view-- . However, if one really wants to recognise Dzogchen originally pure rigpa, without being covered by darkness, unclearness and downess, without stained by experiences of bliss, luminance and non-thought, without mixing with mindful view of other 8 yanas also Dzogchen Sem de and Long de, then he needs to follow a Guru who by himself completely, nakedly and directly relise the originally pure rigpa. The student should get detail instructions in front of him until totally understand. Otherwise, views from books are useless and have no benefits."